Those who breach the law face fines ranging from $175 to $3,500.
In Portugal, President António José Seguro has enacted a law that bans face coverings in public spaces.
The legislation is seen as targeting Muslim women who wear burqas and niqabs.
There are exemptions for health, professional, artistic, or weather-related reasons.
Face coverings are also permitted in places of worship, diplomatic missions, and on aircraft.